Edwards signals come with innovative features that meet all your signaling applications needs. From simple horns and bells to demanding factory automation signaling utilizing your PLC or Devicenet network, Edwards Signaling provides complete factory solutions. Find out what makes signaling sense to you! GE Interlogix (Sentrol) Industrial is a market leader in the development and manufacture of safety interlock switches and position sensors for industrial applications. Whether it’s a new machine design or a retrofit to increase operator safety on an existing machine, GE Sentrol Interlogix Industrial GuardSwitches and mechanical safety interlocks provide the best fit for your application. All Sentrol Industrial GuardSwitches are non-contact, magnetic devices consisting of a switch and a magnet actuator.